I think something might have gone wrong somewhere? There are commits to the git repo to update xrandr to 1.5.1 but I noticed today that xrandr is still version 1.5.0. I tried "apt -t experimental install x11-xserver-utils" but it's the same version that is in debian sid.
I tried to build it this way but it didn't work.
# install a up to date version of debian sid
apt-get build-dep x11-xserver-utils
cd x11-xserver-utils
debuild
# some failure happens before it makes any .deb files
Best wishes,
jcarr